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KINEMATICS

Basic notions to describe motion

TermDefinition
Mechanics branch of physics that is concerned with the motion & deformation of bodies that are acted on by mechanical disturbances called forces
Kinematics branch of mechanics that deals with the geometry and time-dependent aspects of motion without considering the forces causing the motion
Vector quantity that is defined by its magnitude and direction
Scalar quantity that is defined only by its magnitude
Position vector that starts at the origin of the reference frame and points to the object of study
Path length the distance travelled by a moving object
Displacement the change in position of a body between two points in time, it is a vector that starts in the initial position of the object and points to the final position
Velocity it is a vector quantity that indicates the time rate of change in position
Speed it is a scalar quantity that refers to "how fast an object is moving" Speed can be thought of as the rate at which an object covers distance.
Acceleration it is a vector quantity that indicates the time rate of change in velocity
Translation type of motion in which all the parts of a rigid body move parallel to and in the same direction as the rest of the body
Rotation type of motion in which a rigid body moves in a circular path around an axis of rotation, as a result, all points in the body simultaneously rotate in he same angular direction across the same number of degrees
Axis of rotation imaginary line about which all the parts of a body move in circle during rotation
Active movement movement caused by stimulated muscle
Passive movement movement caused by sources other than active muscle contraction
Projectile any object that once projected or dropped continues in motion by its own inertia and is influenced only by the downward force of gravity
Free fall projectile motion
Parabolic trajectory path of a free-falling object
Created by: Ana Aranda
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